No such 386 instruction w/2.0.25

Thomas Molesworth (thomas@bass.almac.co.uk)
Sun, 17 Nov 1996 12:51:37 +0000 (GMT)


I get the following error message when trying to compile 2.0.25:

make[1]: Entering directory `/usr/src/linux/arch/i386/kernel'
gcc -D__KERNEL__ -I/usr/src/linux/include -Wall -Wstrict-prototypes -O2
-fomit-frame-pointer -fno-strength-reduce -pipe -m486 -DCPU=486 -c
-o time.o time.c
{standard input}: Assembler messages:
{standard input}:768: Error: no such 386 instruction: `rdmsr'
{standard input}:770: Error: no such 386 instruction: `wrmsr'
make[1]: *** [time.o] Error 1
make: *** [linuxsubdirs] Error 2
make[1]: Leaving directory `/usr/src/linux/arch/i386/kernel'

Any suggestions?

System is 486dx2/66 w/32Mb memory, 800Mb mounted on /usr, 200Mb on /,
running 2.0.21. I can include .config if necessary.

It seems to be code for an AuthenticAMD, from the time.c code:

if (x86_capability & 16) {
do_gettimeoffset = do_fast_gettimeoffset;

if( strcmp( x86_vendor_id, "AuthenticAMD" ) == 0 ) {
if( x86 == 5 ) {
if( x86_model == 0 ) {
/* turn on cycle counters during power down */
__asm__ __volatile__ (" movl $0x83, %%ecx \n \
>> rdmsr \n \
orl $1,%%eax \n \
>> wrmsr \n "
: : : "ax", "cx", "dx" );
udelay(500);
}
}
}

--
Thomas Molesworth            (thomas@bass.almac.co.uk)